Checkpoints are respawn points. Players who die appear back at the last checkpoint they reached. Players can also leave the game and resume at the last checkpoint at a later date. In effect they are a 'save game' feature. The following Checkpoints appear in Occupied Ruins

Write about events that have taken place in this area in previous games, the impact it has on Diablo III. If any of the classes hail from this region make mention of that as well as any significant NPCs that may be connected to this zone.